Spray 9-inch square pan with nonstick cooking spray. In large saucepan, combine gelatin, corn syrup and margarine; mix well. Cook over medium heat until mixture comes to a boil, stirring constantly.
Remove saucepan from heat. Stir in cereal until coated. Press mixture in sprayed pan. Cover; refrigerate about 30 minutes or until set.
Cut into bars. Top each bar with leaf candy.